Patents by Inventor Dirk Leys

Dirk Leys has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of producing polyetherpolyols
    Patent number: 6664428
    Abstract: A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: December 16, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Ostrowski, Kathrin Harre, Georg Heinrich Grosch, Gerd Höppner, Peter de Vocht, Dirk Leys, Jürgen Winkler, Stephan Bauer
  • Method for producing polyetherpolyols
    Publication number: 20030013921
    Abstract: A process for the preparation of polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst is proposed, the reaction being carried out in a stirred kettle reactor and the reaction mixture being circulated via an external heat exchanger by means of a pump.
    Type: Application
    Filed: August 20, 2002
    Publication date: January 16, 2003
    Inventors: Thomas Ostrowski, Kathrin Harre, Georg Heinrich Grosch, Gerd Hoppner, Peter de Vocht, Dirk Leys, Jurgen Winkler, Stephan Bauer